CVE-2026-123601

Name	CVE-2026-123601
Description	Hickory DNS hickory-proto 0.25.0 through 0.26.0-alpha.1 and hickory-net 0.26.0-beta.1 before 0.26.2 invert the relational operators in the wrap-around branch of find_covering_record() in nsec3.rs, so the last NSEC3 record in a zone's hash ring covers every hash except its owner. Attackers able to inject DNS responses can replay that NSEC3 record and its RRSIG to forge DNSSEC-validated negative responses denying legitimate names.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
rust-hickory-net (PTS)	forky, sid	0.26.3-1	fixed
rust-hickory-proto (PTS)	trixie	0.24.4-2	vulnerable
	forky, sid	0.26.3-1	vulnerable

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
rust-hickory-net	source	(unstable)	0.26.3-1
rust-hickory-proto	source	(unstable)	(unfixed)

https://github.com/hickory-dns/hickory-dns/security/advisories/GHSA-588m-chg6-8jqj